結果
問題 | No.2500 Products in a Range |
ユーザー | 👑 emthrm |
提出日時 | 2023-09-02 20:05:31 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,969 bytes |
コンパイル時間 | 2,172 ms |
コンパイル使用メモリ | 136,664 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-12 06:12:27 |
合計ジャッジ時間 | 2,836 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | WA | - |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | AC | 3 ms
5,376 KB |
testcase_09 | AC | 1 ms
5,376 KB |
testcase_10 | AC | 3 ms
5,376 KB |
testcase_11 | AC | 4 ms
5,376 KB |
testcase_12 | AC | 3 ms
5,376 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | AC | 4 ms
5,376 KB |
testcase_17 | AC | 4 ms
5,376 KB |
testcase_18 | AC | 3 ms
5,376 KB |
testcase_19 | AC | 5 ms
5,376 KB |
testcase_20 | AC | 4 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 5 ms
5,376 KB |
testcase_23 | AC | 4 ms
5,376 KB |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | AC | 4 ms
5,376 KB |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | AC | 2 ms
5,376 KB |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
testcase_37 | AC | 2 ms
5,376 KB |
testcase_38 | AC | 1 ms
5,376 KB |
testcase_39 | AC | 2 ms
5,376 KB |
testcase_40 | AC | 1 ms
5,376 KB |
testcase_41 | AC | 2 ms
5,376 KB |
testcase_42 | WA | - |
testcase_43 | AC | 2 ms
5,376 KB |
testcase_44 | WA | - |
testcase_45 | AC | 2 ms
5,376 KB |
testcase_46 | AC | 2 ms
5,376 KB |
testcase_47 | WA | - |
testcase_48 | AC | 1 ms
5,376 KB |
testcase_49 | AC | 2 ms
5,376 KB |
testcase_50 | AC | 3 ms
5,376 KB |
testcase_51 | AC | 3 ms
5,376 KB |
testcase_52 | AC | 4 ms
5,376 KB |
testcase_53 | AC | 3 ms
5,376 KB |
testcase_54 | AC | 2 ms
5,376 KB |
testcase_55 | AC | 3 ms
5,376 KB |
testcase_56 | AC | 3 ms
5,376 KB |
testcase_57 | AC | 4 ms
5,376 KB |
testcase_58 | AC | 2 ms
5,376 KB |
testcase_59 | AC | 4 ms
5,376 KB |
testcase_60 | AC | 2 ms
5,376 KB |
ソースコード
#include <algorithm> #include <bit> #include <cassert> #include <cstdint> #include <functional> #include <iostream> #include <numeric> #include <vector> namespace emthrm { template <typename Band> struct SparseTable { using BinOp = std::function<Band(Band, Band)>; SparseTable() = default; explicit SparseTable(const std::vector<Band>& a, const BinOp bin_op) { init(a, bin_op); } void init(const std::vector<Band>& a, const BinOp bin_op_) { bin_op = bin_op_; const int n = a.size(); assert(n > 0); lg.assign(n + 1, 0); for (int i = 2; i <= n; ++i) { lg[i] = lg[i >> 1] + 1; } const int table_h = std::countr_zero(std::bit_floor(a.size())) + 1; data.assign(table_h, std::vector<Band>(n)); std::copy(a.begin(), a.end(), data.front().begin()); for (int i = 1; i < table_h; ++i) { for (int j = 0; j + (1 << i) <= n; ++j) { data[i][j] = bin_op(data[i - 1][j], data[i - 1][j + (1 << (i - 1))]); } } } Band query(const int left, const int right) const { assert(left < right); const int h = lg[right - left]; return bin_op(data[h][left], data[h][right - (1 << h)]); } private: BinOp bin_op; std::vector<int> lg; std::vector<std::vector<Band>> data; }; } // namespace emthrm // <WA> #910622 ベース int main() { constexpr int kMaxN = 5000, kMinA = -1000000000, kMaxA = 1000000000; int n, l, r; std::cin >> n >> l >> r; assert(1 <= n && n <= kMaxN && kMinA <= l && l <= r && r <= kMaxA); std::vector<std::int64_t> a(n); for (int i = 0; i < n; ++i) { std::cin >> a[i]; assert(kMinA <= a[i] && a[i] <= kMaxA); } std::ranges::sort(a); std::vector<int> p_prime(n, n), q(n, -1), q_prime(n); for (int i = 0; i < n; ++i) { if (a[i] < 0) { for (int lb = -1; lb + 1 < p_prime[i];) { const int p = std::midpoint(lb, p_prime[i]); (a[i] * a[p] <= r ? p_prime[i] : lb) = p; } for (int ub = n; q[i] + 1 < ub;) { const int cand_q = std::midpoint(q[i], ub); (a[i] * a[cand_q] >= l ? q[i] : ub) = cand_q; } } else { for (int lb = -1; lb + 1 < p_prime[i];) { const int p = std::midpoint(lb, p_prime[i]); (a[i] * a[p] >= l ? p_prime[i] : lb) = p; } for (int ub = n; q[i] + 1 < ub;) { const int cand_q = std::midpoint(q[i], ub); (a[i] * a[cand_q] <= r ? q[i] : ub) = cand_q; } } if (q[i] < p_prime[i]) { p_prime[i] = n; q[i] = -1; } else { p_prime[i] = std::max(p_prime[i], i + 1); } q_prime[i] = std::min(q[i], i - 1); } int ans = 1; const emthrm::SparseTable<int> sparse_table( q_prime, [](const int x, const int y) -> int { return std::max(x, y); }); for (int i = 0; i < n; ++i) { if (p_prime[i] < q[i]) { const int f = 3 - p_prime[i] + sparse_table.query(p_prime[i], q[i]); ans = std::max({ans, f, 2}); } } std::cout << ans << '\n'; return 0; }